How to Spot Fake Reviews on Amazon
wired.com
wired.com
1. Post statistic of how much that product was bought vs how often it was returned within a timeframe.
2. Put greater emphasis on the reviews of longterm accounts with significant purchase history.
3. Not allow any accounts that have not bought the product to post a review at all.
4. Punish products heavily if evidences of review tampering were found.
And so forth
Of course, there's the occasional disgruntled reviewer ranting about how the goods where received (or not), but other than that it is a "good enough" indicator for me...
Step 2: is it on Amazon?
Output: If Yes and Yes, over 50% probability it's fake.
Just look when the review was made and if the day it was posted on contains an "a" then it's fake.